Electric heater.



F. KUHN.

ELECTRIC HEATER.

APPLwATIon num 001.5, 1912.

1,087,594. Patented Feb. 17,1914.

UNTTED STATES PATENT orages.

FRANK KUHN, 0F DETROIT, MICHIGAN.

ELECTRIC HEATER.

Specification of Letters Patent.

Patented Feb. 17, 1914.

Application led October 5, 1912. 4Serial No. 724,172.

To all whom 'it may concern: Be it known that I, FRANK KUHN, a citizen' of the United States of America, re

' designed for use in connection with various cooking utensils-such as coffee pots, etc., and it is the primary object of-the invention to obtain a construction of heater base which may be exchan eably engaged with different utensils and wich permits of readily detaching the heating-element from both the hase and the utensil to facilitate the cleaning of said parts. y

To this end the invention consists in the construction as hereinafter set forth.

In the drawings: Figure 1 is a perspective view of the base detached; Fig. Q is a vertical central section through the instrument in operative condition; Fig. 3 is a perspective view of the heating unit detached; Fig. 4 is a perspective view of the standdetacherl; and Fig. 5 is a perspective view of the attaching screw.

To convey the heat from an electric heating-element to the body to be heated, it is desirable to have a relatively large contacting surface, but with many cooking utensils-Yas t'or instance coffee and tea perco# latorsit is necessary to concentrate the heat in a comparatively small body. To accomplish this result the utensil is provided with a base portion which enlarges into a fiat plate which is the full arca of thc heating unit., so that when said unit is clamped to said plate thc heat transferred to the latter will be conveyed by conduction to the point of application.

lVith my improved construction, various utensils to bc heated are provided with heat receiving liaseplates A, which are of slightly greater diameter than the heating unit l of disk form.

C is a stand comprising an annular mem' her. preferably struck up from sheet metal and haring at its top a. recess D of a diam rter lo receive and fit the plate A.

ll is a ledge extending inward at the bottom ol tlnrecess D and Forming a support for the plate A, while the space within this ledge isof a diameter to receive the heating unit B.

The memberC is preferably formed in'- tegral with a cup portion F, which forms a heatinsulating air chamber beneath the base A, the`latter being sup orted within this cup by a central bracket The stand C is provided with a plurality of legs H, preferably attached to a base plate I, which in turn is secured to the cup portion F by the same screw J which attaches the bracket G. The portions F and C are provided with` alined a ertures for the passage outwardvof termina s K and Kr: mounted upon the element B and projecting outwardly there- -from.

L are securing shoulder screws, preferably provided with T-shaped heads M, which facilitate their engagement and disengagement. These screws are inserted through' apertures N in the bottom of the cup portion F, andthe threaded end portions P ass through apertures Q in the heating-e ement B and engage threaded ap' ertures R in the member A. Thus to attach thc utensil to the stand and at the same time to clamp the element in firm heat-conducting contact with the plate A, it is merely necessary to engage and tighten the screws L.

With the construction as described,various utensils may be used with the same heater, and quickly engaged and disengaged therefrom. When in engagement the stand C merges into the base plate A so as to produce a pleasing appearance, and by reason of the fact that the only contact betweer the stand and base A is at the margin of the latter, very little h eat is lost. At any time when necessary. the Aheating element B may be completely detached so as to permit the washing of the other parts. This element B is preferably armored and is provided on its under side with a heat-distributing plate B; but the specific construction of the clement forms no part of the present invention,

What I claim as my invention is:

1. ln an electric heater the combination with a utensil having a flat, disk base of an annular stand, fashioned to afford marginal support for said hat diskxan electrical heating element within said stand in contact with said disk, and means operable from beneath the stand in the assembled position of the parts for clamping said element and stand to said disk.` 2. In-an electric heater the combination of 'an annular stand having a recessed top with an inwardly-extending ledge in said recess, a. removable utensil having a dat, disk base Hitting in said recess and supported upon said ledge, a fiat heating-element fitting Within said ledge, in contact with said disk, and clamping screws operable from beneath said stand in the assembled position of the parts for clamping said element to said disk and for securing the latter to Asaid stand.

3. An electric heater comprising a stand, having an annular portion and a central depressed or cup portion, provided with a ledge near the top thereof, a utensil having a flat disk fitting Within said'cup portion and supported upon said ledge, a heatingelement fitting within said ledge and in contact with said disk, terminals on said element passing outward through said cup and an# f nular portion, and V4clamping means engageable through the bottom of said cup f or clamping said heating-element to said disk.

4. An electric heater comprising a stand, having an annular portion and a central depressed or cup ort-ion, struck up from a sheet met-al blank, said cu portion having an inwardly-extending le e near the top thereof, a utensil having a disk-shaped base fitting within said cup portion and supported upon said ledge, a heating-element fitting within said ledge, in contact with said disk, terminal contacts passing through registering apertures in said cu and annular portion, a central bracket or support-ing said heating-element within said cup, and a shouldered clamping screw engaging an aperture in said cup and securing said heating-element to said base.

5. An electric heater comprising' a sheet metal stand, having an annular portion and a cent-ral depressed cup portion, provided with an inwardly-extending ledge near its top, a utensil having a fiat, disk base iitting Within said cup portion and supported on said ledge, a heating-element fitting with# in said ledge in contact with said disk, terminal contacts on said heating-element, extending outward through reglstering apertures in saidcu and annular portion, a central bracket or supporting said heater from the bottom of said cup, a plurality of legs for said stand, a bottom plate to which saidlegs are attached, a screw for securin said bottom plate, engagin said centralracket, and a clamping shouldered screw ,engaging registering apertures in said bottom'plate and cup, and clamping said heater to said disk.

In' testimony whereof I aix my signature in presence of two witnesses.

FRANK KUHN.

Witnesses:

JAMES P. BARRY, DELBERT COLLINS. 

